Key chain



FIG. 1 is a perspective view of a key chain showing my new design;

FIG. 2 is a bottom plan view the opposite side being a mirror image;

FIG. 3 is a left side elevational view, the opposite side being a mirror image;

FIG. 4 is a top side elevational view;

FIG. 5 is a bottom side elevational view. 

The ornamental design for a key chain, as shown. 